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| author | Quentin Carbonneaux <quentin@c9x.me> | 2022-12-12 17:36:15 +0100 |
|---|---|---|
| committer | Quentin Carbonneaux <quentin@c9x.me> | 2022-12-12 22:16:33 +0100 |
| commit | c0f25aeae3ef5d5f4b6bc5678f8d8ce40597d673 (patch) | |
| tree | 26b78f6db8a8fd46005ce94835b0135a6df4eef7 /amd64 | |
| parent | 2ec355df6adc457303fcf2076b559fefd80ee593 (diff) | |
| download | roux-c0f25aeae3ef5d5f4b6bc5678f8d8ce40597d673.tar.gz | |
new rsval() helper for signed Refs
The .val field is signed in RSlot.
Add a new dedicated function to
fetch it as a signed int.
Diffstat (limited to 'amd64')
| -rw-r--r-- | amd64/emit.c | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/amd64/emit.c b/amd64/emit.c index 9e5996b..9b8bb5d 100644 --- a/amd64/emit.c +++ b/amd64/emit.c @@ -142,20 +142,19 @@ static char *rname[][4] = { static int -slot(int s, Fn *fn) +slot(Ref r, Fn *fn) { - struct { int i:29; } x; + int s; - /* sign extend s using a bitfield */ - x.i = s; - assert(x.i <= fn->slot); + s = rsval(r); + assert(s <= fn->slot); /* specific to NAlign == 3 */ - if (x.i < 0) - return -4 * x.i; + if (s < 0) + return -4 * s; else if (fn->vararg) - return -176 + -4 * (fn->slot - x.i); + return -176 + -4 * (fn->slot - s); else - return -4 * (fn->slot - x.i); + return -4 * (fn->slot - s); } static void @@ -286,14 +285,14 @@ Next: fprintf(f, "%%%s", regtoa(ref.val, sz)); break; case RSlot: - fprintf(f, "%d(%%rbp)", slot(ref.val, fn)); + fprintf(f, "%d(%%rbp)", slot(ref, fn)); break; case RMem: Mem: m = &fn->mem[ref.val]; if (rtype(m->base) == RSlot) { off.type = CBits; - off.bits.i = slot(m->base.val, fn); + off.bits.i = slot(m->base, fn); addcon(&m->offset, &off); m->base = TMP(RBP); } @@ -338,7 +337,7 @@ Next: case RMem: goto Mem; case RSlot: - fprintf(f, "%d(%%rbp)", slot(ref.val, fn)); + fprintf(f, "%d(%%rbp)", slot(ref, fn)); break; case RCon: off = fn->con[ref.val]; |